1/4 c. Worcestershire sauce
3/4 c. Kikkoman soy sauce
1/2 c. sugar
1/2 c. salad oil
1/4 tsp. garlic powder
1 tsp. onion, chopped (optional)

Mix above ingredients well. Put 1 tablespoon sesame seeds in small saucepan and heat until brown. Add to mixture. Cut 2 pounds Sirloin tip into strips 1 x 3 inches. Soak meat in marinade 12 to 24 hours. Put on skewers with mushrooms, green pepper strips, fresh pineapple chunks, etc. Grill outside over charcoal or broil in oven.